Sheet-metal pulley and the manufacture thereof



(No Model.) 2 SheetsSheet 1. T. GORSCADEN. SHEET METAL PULLEY AND THE MANUPAOTURE THEREOF.

Patented May 10, 1892.

)0 \QJ r I @M D D A (DIG Wil /75 552 JKM (No Model) 2 SheetsSheet 2. T. OORSOADEN. SHEET METAL PULLETAND THE MANUFACTURE THEREOF" No. 474,547.

Patented May 10, 1892.

UNITED Status PATENT @rmca.

THOMAS CORSCADEN, OF NEW BRITAIN, CONNECTICUT.

SHEET-METAL PULLEY AND THE MANUFACTURE THEREOF.

SPECIFICATION forming part of Letters Patent No. 474,547, dated May 10, 1892.

Application filed August 11, 1891. $eria1 No. 402,336. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS OoRsoADnN, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Sheet-Metal Pulleys and the Manufacture Thereof, of which the following is a specification.

My invention relates 'to improvements in the manufacture of sheet-metal pulleys; and its objects are simplicity and economy in construction and convenience and efficiency of the product.

In the accompanying drawings, Figure 1 is side elevation, partly in section, of the major portion of my pulley. Fig. 2 is a sectional View thereof on the line 00 0c of Fig. 1. Fig. 3

is a view of the inner side of one end of one part of the rim with the blank for the fastening-lug formed thereon. Fig. 4 is an inside view of the rim, showing the joint or seam at the untied ends of its two parts; and Fig. 5 is a reduced plan view of a set of spoke-arms and connecting-web.

All that portion of the pulley on the left of the line an 00 in Fig. 1 is a duplicate of the portion shown 011 the right of said line.

In another application of even date herewith I have shown, described, and claimed a pulley having many features in common with those herein described, and this application may be considered in the nature 'of an improvement thereon.

I form the rim A of sheet metal with a turned-in flange 6 at each edge, as in said application; butI make a different joint or seam at the meeting edges of the two parts of said rim. I cut the ends of each half squarely off for a short distance from their edge inwardly and form a perforated fastening-lug 7 in the middle portion, as shown in Figs. 1, 3, and 4, the metal preferably being slit a short distance into the body of the rim and in the line of the side edges of said lug, as shown at 8 8, Fig. 3. These lug-blanks are then turned inwardly at about right angles to the broad surface of the rim, whereby the two parts of the rim when placed together may be secured by bolts 9, passing through said lugs, as shown in Figs. 1 and 4, either with or without the washers'lO.

The spokes maybe single or compound, the same being formed of sets of spoke-arms connected by a yielding web. I form each set of spoke-arms 11 11 11 and the connecting-web 12 of one flat piece of sheet metal in the form shown in Fig. 5, the spoke-arm blanks having the form of parallel fingers extended from the palm-like connecting-web. This blank may be perforated. at various points to receive the several rivets intended for use therewith, also with the bolt-block lug-holes 13. The webblank is then bent transversely into a semicylindrical form and the spoke-arm blanks bent transversely to their length, so that they radiatefromthe semi-cylindrical yieldingweb, as shown in Figs. 1 and 2. Thus it will be seen that the spoke-arms and web-blanks are formed by blanking out in a fiat form and then bending said arms and web on lines substantially at right angles to each other. While I have described first bending the web-blank, it is evident that the same result will be accomplishedby first bending the spoke-arms and then the web, or by simultaneously bending both. If the wheel is to have compound spokes B, as shown, the outer ends of the spoke-arms are bent to form lugs 14-, by which to secure the spokes and rim together, as in aforesaid application, and the two arms of each compound spoke secured together by rivets, either with or without an intervening piece. I employ two semi-cylindrical halfshells C C ofa length about equal to the distance from the outer edge of one yielding web to the outer edge of the opposite yielding web in the direction of the axis of the wheel, and I perforate said shells with holes that coincide with the holes 13 in the cylindrical webs, .as shown in Fig. l. I provide bolt-blocks I), having lugs 15, which enter said holes, and bolts 16, passing through said blocks to draw the two parts of the pulley together and bind them upon the shaft. A bushing 17 can be used or not, as circumstances may require. The half-shells C C, in connection with the semi-cylindrical webs, form the hub of the pulley, or, rather, the central yielding portion,

which is all the hub the pulley has. It is, however, evident that by merely making the lugs on the bolt-blocks shorter, so as to be flush with the inner surface of the yielding webs, the half-shells may be omitted and the pulley be clamped on the shaft with the yielding web in direct contact therewith. I

I claim as my invention- 1. In a sheet-metal pulley, the sheet-metal rim having edge flanges 6, made in two parts, with the fastening-lugs 7, cut from the middle portion of the adjoining ends and bent in-' wardly for securing together, while the flanged edges outside of said lugs are cutoff squarely and abut directly against each other, substantially as described, and for the purpose specified.

2. In a pulley, the semi-cylindrical yielding web 12 and the set of radiating spoke-arms extending from the edge of the metal at one end of said cylindrical web, substantially as described, and for the purpose specified.

3. In a pulley, the sets of spoke-arms and connected semi-cylindrical yielding web, from the edge of which at one end said spoke-arms extend, bolt-blocks secured to saidwebs, and clamping-bolts, substantially as described, and for the purpose specified.

4. In a pulley, the sets of spoke-arms and connected semi-cylindrical webs having perforations 13, the half-shells with perforations coinciding with those in said webs, the boltblocks having lugs for entering said perforations, and the clamping-bolts, substantially as described, and for the purpose specified.

5. In the manufacture of sheet-metal pulleys, the method of forming the spoke-arms and connecting-Web, which consists of blanking out from a flat piece of sheet metal substantially parallel spoke-arm blanks with a connecting-web blank, then bending the web and spoke-arm blanks on lines at right angles to each other into the form of a semi-cylindrical connecting-web, and spoke-arms. radiating therefrom, substantially as described.

THOMAS OORSOADEN.

Witnesses:

A. J. MCOAFFREY,

PETER F. CALLAHAN. 

